Hi - relative noob here. I basically started using RetroArch once I started using HyperSpin about a month ago, so I’m still learning. I’m really enjoying it so far!
My question is whether there’s any way to play the E-Reader levels using RetroArch. It’s pretty easy to do using the Visual Boy Advance M emulator - you just start the game, go to the Import>Battery File, and click on the sav file that has the E-Reader files I want to try. But when I start up SMA4 using Retroarch, I don’t see any option to import a battery save file.
I’m sure I’m just missing something utterly obvious, but I’d appreciate the help! And if anyone happens to be running RetroArch through RocketLauncher and has insight on whether that would complicate things, even better. 
Thanks!